ROBERT JAJCAY

Terre Haute, IN
(812) 237-2138 (office)

Professor of Mathematics

Department of Mathematics and Computer Science

at Indiana State University

Terre Haute, IN 47809

robert.jajcay@indstate.edu





SUMMER I, 2012

MA 231, Calculus I



SUMMER II, 2012

MA 241, Introductory Statistics



School Year 2012 - 2013

on leave




EDUCATION

Ph.D. Mathematics/Computer Science (minor), May, 1995

University of Nebraska-Lincoln, Lincoln, Nebraska

Research specialty: Algebraic Combinatorics

Dissertation: Vertex-transitive graphs and maps and their automorphism groups

Advisor: Professor Spyros S. Magliveras


RNDr., summa cum laude, Mathematics
Comenius University, Bratislava, Slovakia, 1988



MOST RECENT PUBLICATIONS AND PROFESSIONAL ACTIVITIES


G. Exoo, R. Jajcay and J. Siran, Cayley cages,
J. Algebr. Comb. 38, 1 (2013) 209-224.

G. Exoo and R. Jajcay, Recursive constructions of small regular graphs of given degree and girth,
Discrete Mathematics 312 (2012) 2612-2619.

R. Jajcay and J. Siran, Small vertex-transitive graphs of given degree and girth,
Ars Mathematica Contemporanea 4 (2011) 375-384.

R. Feng, R. Jajcay and Y. Wang, Regular t-balanced Cayley maps for abelian groups,
Discrete Math. 311 (2011) 2309-2316.

G. Exoo and R. Jajcay, On the girth of voltage graph lifts,
Europ. J. of Combinatorics 32 (2011) 554-562.

M. Conder, G. Exoo and R. Jajcay, On the limitations of the use of solvable groups in Cayley graph cage constructions,
Europ. J. of Combinatorics 31 (2010), 1819-1828.

T.B. Jajcayova, R. Jajcay, and E.S. Kramer, The life and mathematics of Dale Marsh Mesner, 1923 - 2009,
Bulletin of the ICA 59 (2010) 9-30.

G. Exoo and R. Jajcay, Properties of Groups for the Cage and Degree/Diameter Problems,
Electronic Notes in Discrete Mathematics 34 (2009) 341-345.

G. Exoo and R. Jajcay, Dynamic cage survey,
Electron. J. Combin., Dynamic Survey 16, September 2008.

R. Jajcay, A. Malnic, and D. Marusic, On the number of closed walks in vertex-transitive graphs,
Discrete Math. 307, no. 3 - 5, 484 - 493 (2007).

M. Conder, R. Jajcay, and T. Tucker, Regular Cayley maps for finite abelian groups ,
J. Algebr. Comb. 25, No. 3, 259-283 (2007).

M. Conder, R. Jajcay, and T. Tucker, Regular t-balanced Cayley maps ,
J. Comb. Theory, Ser. B 97, No. 3, 453-473 (2007).

R. B. Richter, J. Siran, R. Jajcay, T.W. Tucker, and M.E. Watkins, Cayley maps ,
J. Combin. Theory Ser. B, 95 (2005), no. 2, 189 - 245.


ALL PUBLICATIONS



TEACHING EXPERIENCE

Educational Excellence Award , College of Arts and Sciences, ISU, April 1999


GRADUATE STUDENTS

Michael Cameron , MSc, 1998, Constructing Regular Cayley Maps Using Computers


GRANTS AWARDED

Algebraic, Topological and Combinatorial Structures on Graphs,
APVV, 2011 - 2014 (with M. Skoviera)

Research and Development Cooperation Slovakia -- China,
2011 - 2012, (with R. Nedela)

Algebraic, Combinatorial and Topological Structures on Graphs,
APVV, 2008 - 2010 (with M. Skoviera)

Symmetric graphs and maps,
VEGA, 2002 - 2004 (with J. Siran)

US - Slovenia cooperation,
awarded by the Slovenian Ministry of Science, 2002 - 2006 (with D. Marusic)

National Research Council's Collaboration in Basic Science and Engineering (COBASE),
2002 (with D. Marusic)

Summer research grants
awarded by the Indiana State University Research Council, 1996, 1998, 2004, 2009


CONFERENCES ORGANIZED

Midwest Graph Theory Conference, MIGHTY LII
Terre Haute, IN, April 27-28, 2012

Indiana Section of the Mathematical Association of America
Terre Haute, IN, April 2-3, 2004

Midwestern Conference on Combinatorics, Cryptography and Computing
Terre Haute, IN, Oct.30 - Nov. 1, 1997


PRESENTATIONS



LINKS